The aim of this research is finding the effect of one period of training on hemoglobin, hematocrit, RBC of athlete girls. . In this research effect of eight weeks aerobic training which including 40 minute running twice a week with 60 to 65 percent reserve heart rate on HB, HCT & RBC wereexamined.13 athlete girls were selected none randomly. The samples did not have any disease. They were not smokers. The samples are asked that they go to the laboratory in 9 clocks at morning for performing blood examination. Getting blood sampling was performed in seventh day of girl s follicular period. Training was eight weeks& twice on each week. Each session were 40minutes running with 60 to 65 percent of reserve heart impulse for girls. Automatic machines for measuring of hemoglobin, hematocrit & RBC were used. Raw information was considered by using of descriptive statistics methods which conclude of tables, means & standard deviation. Also deduction statistic method which was concluded student of associate groups was considered. For refusing or accepting of hypothesis level (< %5 or = %5) was considered & spss was used. It was seen significant decrease in HB, HCT, and RBC in athlete girls. (P > 5%)
